【作者】 高辉；

【导师】 李仲东；

【作者基本信息】 成都理工大学 ， 矿产普查与勘探， 2012， 硕士

【摘要】 鄂尔多斯盆地上三叠统延长组长9段在2005勘探取得突破，近些年来，不断有新的长9油层组石油被发现，一些地区油井甚至具有很高的工业油流产出，但各个地区的长9油层组分布比较分散，大多井都产水，油水分布关系比较复杂，镇泾探区同样存在这个问题。通过对研究区储层四性关系、油水识别、分布及产水机理进行了研究。详细研究和对比了不同产层（油层、油水同层、含油水层、水层及干层）“四性”关系，确定了储层的下限。对研究区的物性参数进行了解释，在储层下限的基础上，解释了储层的有效厚度、孔隙度和渗透率，储层有效厚度0－22米，一般分布在8－16米，最发育在红河55井区的红河55－6—红河55－3和红河42井区的红河53—红河42一带，与主分流河道展布一致，孔隙度和渗透率平面展布和有效砂体展布基本一致。应用了多种方法对油水层进行了识别，取得了良好的效果。①建立了研究区的油水识别图版，区别效果好。②应用马氏判别识别方法进行了油水识别，识别油水层的正确为88.2%。③费氏判别识别方法识别油水层的正确亦为88.2%。综合运用三种方法对研究区的老井进行了复查，识别出油水同层为7.9米，含油水层为141.9米，没有油层，绝大部分为干层和水层，这与前期勘探油气显示不好相一致。研究区油水层主要分布在长91段的长912，油水分布主要受岩性控制，油藏类型为岩性和构造-岩性圈闭油气藏，井区每口井都产水，一般高部位油多水少，低部位水多油少，油主要聚集在斜坡高部位。地层水存在两种类型，一种产于河道边部的透镜体型水，物性差，产水量少，氯离子含量低，水体量小，不影响勘探；另一种为边底水，产水量较大，氯离子含量高，勘探应避开。通过压汞、相渗资料计算了研究区长91段不同类型储层的油水过渡带厚度，表明油气过渡带厚度远大于圈闭的闭合高度。红河42－红河55井区整体处于油水过渡带，且位于过渡带的中下部，这就是研究区每口井都产水，而且水多油少的缘故。更多还原

【Abstract】 In the Ordos Basin,the exploration of Upper Triassic chang9extend thebreakthrough in2005.in recent years,the oil flow was found in chang9constantly.Insome areas there have been a high industrial oil,but in various regions the distributionof the Chang9is dispersed,Stratum of the most wells are water layer,water distributionis more complex,Zhenjing exploration area also have this problem.“Four properties” inthe study area,the oil-water identification,distribution and production mechanism ofwater are researched.In order to determine the reservoir of the lower limit,comparison of differentlayer’s oil layer,oil-water layer,the oily water layer,water layer and the dry layer)”Fourproperties” were studyed detailly.Explain the physical parameters of the studyarea,explained on the basis of the reservoir lower limit of the reservoirthickness,porosity and permeability,reservoir effective thickness is0-22m,generallydistributed in the8-16m,in the Honghe55wells District,the most developed area isHonghe55-6-Honghe55-3and in the Honghe42wells District is Honghe53-theHonghe42,along the main distributary channel show cloth,distribution ofporosity,permeability and effective thickness of sand is consistent.Applied to a variety of methods to identify the oil-water layer,achieved goodresults.①Establish identify the oil-water plates of the study area,good results wereAchieved.②The Mahalanobis distance identification method identify the correctoil-water layer of88.2%.(3)Fisher discriminant to identify ways to identify the correctoil-water layer is also88.2%.Integrated use of three old wells of the study area werereviewed to identify the oil-water layer of oily water layer is7.9m to141.9m,there is noreservoirs,most of the dry layer and water layer,which is the early exploration of oil andgas show good consistent. Oil-water layer of the study area is mainly distributed in chang912of chang91,thewater distribution is mainly controlled by lithology,reservoir type of lithology andstructure-lithologic traps oil and gas reservoirs,wells wells are producing water,thegeneral parts oil more than water,and low parts of water and more oil,the oil gathered inthe high slope parts.Formation water, there are two types,one produced in the lens bodyof water of the river edge was called lens water,poor physical properties,producing lesswater,content of chloride ion is low and a small amount of water,does not affect theexploration;another is edge and bottom water,water production than large,highchloride ion content,exploration should be avoided.Mercury pressure,relative permeability data calculated oil-water transition zonethickness of91segments of different types of reservoirs in the Chang showed that theoil and gas transition zone thickness is much larger than the closed height oftraps.Honghe42-Honghe55well area as a whole is in the oil-water transition zone andin the lower of it.this is the reason of wells producing water,and water is more than oilin this study area。更多还原